Three field crop rotations were not entirely uncommon back then, and IRL four field rotation started in the late 17th Century... so while you are certainly a bit ahead of the time, it is not inconceivable that an enterprising farmer (with a good roll) would figure out how to rotate one more field into the mix.
Gunther sits back as you lay out a very enticing proposal... a place to lecture in a prospering town, along with a scribe to copy down his thoughts and musings. He seems slightly unsure of what to say to such a sudden offer, so you sweeten the pot by throwing in a fine house near the town's library and another scribe.
"Sir Stone... this is an offer of unprecedented generosity. I would be a fool to reject it. So I will not reject it. I accept. Thank you, kind Sir."
With that, you tell him that duty calls, and he takes his leave. You send for a bottle of your finest wine, still corked, of course, and then tell Mr. Dent to send for the Count.
You wait for nearly an hour before the man shows up in the middle of the afternoon. He only reeks slightly of alcohol. In fact, this may be the most sober you've seen the man. He does not look well, despite his relative soberness. His porcine cheeks are red, and a gravy stain mars his tabbard.
"Sir R... Stone. I was wondering when you would greet your liege lord."